Another question about 8 3/4 rear ends

I think you'll be fine with any of them. 741 was short sold on an old wives tale years ago that is still believed today. I think you'll be more likely to break something different than a 1-3/8 heat treated solid steel pinion.

x2
IMO the weak part of all of them is the two piece axle/side gear spline engagement. Dr Diff sells an internal parts kit that has a one piece side gear.
http://www.doctordiff.com/powr-lok-internal-parts-kit.html